49ers clinch NFC West title after big day from Christian McCaffrey

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Christian McCaffrey scored three touchdowns, Charvarius Ward had two interceptions — including a pick-6 — and the San Francisco 49ers clinched the NFC West title by pushing their winning streak to six games with a 45-29 win over the Arizona Cardinals on Sunday.

San Francisco's Brock Purdy — making his first NFL start at State Farm Stadium, which is about 45 miles from where he grew up — completed 16 of 25 passes for 242 yards and tied a career high with four touchdowns. He also shook off a hard hit in the second quarter that caused him to miss a few plays.

During their winning streak, the 49ers (11-3) have won all of their games by at least 12 points. They've also won 12 straight against divisional opponents in the NFC West. San Francisco has won back-to-back division titles for the first time since the 2011-12 seasons.

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McCaffrey scored his second touchdown early in the third quarter, sneaking out of the backfield for a 41-yard score and a 28-13 lead. The running back was so wide open that he leaped for the catch, fell down, and still had enough time to get to his feet and sprint to the end zone.

He made it there a third time later in the third quarter after plowing ahead 1-yard for the touchdown and a 35-16 advantage. Deebo Samuel followed with his second touchdown catch in the fourth, a 19-yard reception that made it 42-22.

The 27-year-old McCaffrey finished with five catches for 72 yards and two touchdowns while also running for 115 yards and a score.

Ward put the 49ers ahead for good when he stepped in front of Trey McBride to grab Kyler Murray's pass after the Cardinals